Power Converter — HP to kW, Watts & BTU/h

Convert between horsepower (mechanical and metric), kilowatts, watts, BTU/h, and tons of refrigeration.

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How this conversion works. Every unit is converted through the watt (SI) with conversion factors from NIST Special Publication 811.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert horsepower, mechanical to kilowatt?

1 horsepower, mechanical = 0.7457 kilowatt. Choose "Horsepower, mechanical (hp)" as From and "Kilowatt (kW)" as To, type a value, and the result updates instantly.

What is the difference between hp and metric hp (PS)?

Mechanical hp is 745.70 W (550 ft·lbf/s); metric hp (PS/CV) is 735.50 W (75 kgf·m/s). European car specs usually quote PS — about 1.4% smaller than hp.

How many kW is a ton of air conditioning?

One ton of refrigeration is 12,000 BTU/h = 3.517 kW of cooling capacity. A typical home split unit is 1–2 tons.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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